I'm reading APT and YUM source codes recently, and met the following question: for class apt.package.Package, there are a function "isAutoRemovable", which means: http://apt.alioth.debian.org/python-apt-doc/apt/package.html?highlight=is... Return True if the package is no longer required. If the package has been installed automatically as a dependency of another package, and if no packages depend on it anymore, the package is no longer required. Do YUM codes have the same function as 'isAutoRemovable' feature?? or how to determine such no longer required rpm packages using yum CLIs? Thanks, Ray